324 THE FKESH-WATER LOCHS OF SCOTLAND 
343. A. hypelasma^ Gosse. 
344. Notliolca lojigispina, Kell. 
345. N.folincea, Ehr. 
346. N. striata, Ehr. 
347. Eretmia ciibeutes ? Gosse. 
348. Pl(Fsoma trimcatum, Levander. 
349. P. hudsoni, Liihof. 
350. P. triacanthimi, Berg. 
351. Gastropiis sty lifer, Liihof. 
352. Anapiis testudo, Lauterbarn. 
Gastrotricha. — Several species of this neglected but highly 
interesting order have been observed. Lack of precise information 
and literature prevented the identification of any but two of the 
commonest species. 
353. Cha'tonotiis larus, Miill. Loch Ness. 
354. Ichthydimn podura, Miill. Loch Ness. 
Coelenterata. — The distinctions between the several species of 
Hydra are not very precise, and appear to be sometimes no more 
than differences of colour. 
355. Hydra, imlgar'is, Pallas. Lochs Ness and Oich. 
H. ruhra and H.fusca, are noted for Lochs Ness and Tay, but I am 
not certain whether these can be separated from the common Hydra. 
The distinct green species {H. vir'idis) has not been observed in the 
lochs, but Mr Scourfield found it in a pond between Mallaig and 
Loch Morar. 
Porifera. — 356. SpongUla lacustris. Carter. Spicules are fre- 
quently found ni the tow-nets. 
Finger-like stalks of a sponge have been found in Loch sC Mhuilinn, 
Beauly basin, and in Loch Meiklie (G. West). Mr J. Hewitt also 
reports gemmule of Spongilla from Loch a' Vullan (Ness basin). 
Ciliata. — Only a few species of ciliate Infusoria were identified, 
chiefly in Loch Ness. 
357. Amphileptus gigas, C. and L. Loch Ness. 
358. Trachelocerca olor, Miill. Loch Ness. 
359. Traclielius ovum, Ehr. Loch Ness. 
360. Toxophyllum meleagris, Miill. Frequent. 
361. Chcetospira muscicola. Loch Ness. 
362. Stentor viridis. Loch Ness. 
363. S. coerideus, Ehr. Frequent. 
364. S. niger, Ehr. Lochs Oich and Uanagan. Frequent. 
365. S. polymorpha, Miill. Loch Ness. 
